H. Nagashima, Chikara Itonaga, Jushiro Yasuhara
Oct 19, 2004
Citations
0
Influential Citations
22
Citations
Journal
Organometallics
Abstract
The polymerization of vinyl ethers (CH2CHOR, R = nBu, iBu, tBu, iPr) is catalyzed by a ruthenium cluster, (μ3,η2:η3:η5-acenaphthylene)Ru3(CO)7 (1), using several hydrosilanes as the initiator to give polyvinyl ethers with Mn = 2000−25 000 and Mw/Mn = 1.2−3.4. Spectroscopic analysis of the polymer reveals the existence of an organosilyl moiety at the end group, which is supported by UV and RI detection of GPC. The poly(tert-butyl vinyl ether) prepared by PhMe2SiD as the initiator contains a −CDHOtBu group at the other polymer end. These data suggest the polymer structure is R3Si−(CH2CHOR)n−H. Dominant heterotacticity was observed for the polymer structure, which was independent of organosilanes or solvents.